DOCS: add the removed file, include another option for not cloning (#11)

[41ow1ives]

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Please check if your PR fulfills the following requirements:

• The commit message follows dataverse guidelines link:
• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

What does this PR do?

• Issue Number: docs: Create git hook for coding convention (#10) #11 and discussion i cant find sample files in ETL_01_how_to_run.ipynb #31
• Description: Add the removed file (data_save___hf_obj.yaml) and add another option for not cloning the repository. (examples/etl/ETL_01_how_to_run.ipynb and examples/etl/ETL_02_one_cycle.ipynb file which is using yaml file from directory)

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[41ow1ives]

Thanks for @DT-DEK2 and @gmlwo085 who raise those errors! I would really appreciate it if you could double-check to see if there are any problems.

[gmlwo085]

Great. This is a good sample for quick understanding. Thank you for your active communication with users.